Homebrew PCBs

On Tue, 21 Feb 2012 11:27:21 +0000, you wrote:

>Does a vacuum frame really help. I get excellent results (down to 8/8) 
>without one, just putting the board and transparency on the glass with a 
>book on top.

Main problem is that the glass reduces UV, and the plastic doesn't.  I
went for a shorter exposure and more UV.  I'm also exposing from the
top, not bottom.

Harvey

>
>Leon